bewey



W. F. DEWEY.

BURNER AND STOVE CONSTRUCTION.

APPLICATION FILED OCT. 12. 1517.

1 8 12, 1 080 Patented A110. 5, 1919.

2 SHEETS-SHEET 1.

WITNESS.

W. F. DEWEY.

BURNER AND STOV E CONSTRUCTION. APPLICATION FILED OCT. :2, 1911 1,812,108. Patented A110". 5,1919.

2 SHEETSSHEET 2.

INVENTOR.

A TTORNE Y- citizen-of thellnited States, residin s'rrrns ATEN OFFICE."

F. DEWEY, OF KANSAS CITY, MISSOURI.

BURNER AND STOVE GDNSTRUGTION.

retains.

Specification of Letters Patent.

Application filed c tober 12, 1917. Serial No. 196,303.

of Missouri, have invented, certain new and useful Improvements in Burner and Stove Constructions, of which the following s a full and exact specification.

The present invention relates to burner and stove constructions, and-one of the obects-in view is to provide an improved construction of the so-called wickless type of vapor or liquid fuel burners. To this end it is sought to devise a more eflicient burner structure of this character by virtue of ,a novel arrangement of. the fuel-supply connections'with a viewto afiording a reliable safeg'uard 'against 'any leakage resulting from defective valve parts or connections, or

from the valvenot being entirely closed when the burner is not in use. In this con-- nection it is proposed also to provide means for conveniently regulating the. degree of opening of the valve when the burner is in operation.

A further object is the provision of a novel priming means for measuring and de liver'ing to the burner the proper charge of fuel requiredforlighting the same.

llt is also sought to devise a simple and compact construction which will be inexpentil sive to manufacture. Minor obj ectswill a'pof the detailed specifi-,-

pear in the course cation. I

With these general objects in view-the invention will now be described with reference to the accompanying drawings illustrating a practical embodiment of the improvements, after which those features deemed to be novel willbe set forth and defined in the appended claims.

lfn the drawings- Figure 1 is acentral vertical section showing a portion of a stove and burner constructed in accordance with the present invention;

Fig. 2 is a plan view of the burner. proper with the top portion of the hood omitted;

Fig. 3 is a horizontal section through the same, taken on the line 3-3 of Fig. 1;

Fig. 4 is a front elevation, on a smaller scale,.showing. a stove with the plurality of the burners and the connections thereto;

Fig. 5 is an enlarged sectional detail of one of the valve-regulating means;

' detail.

Fig. 6 is a section on the line 66' of Fig. 5, one larger scale;

Fig. 7 is an enlarged sectionaldetail of the-primer cup.;m

F g. 8 is a plan view'of themes; and Fig. 9 1s a vertical sectional view of a modified form of the inner chimney and baffle structure therefor.

Referring to the drawings, andmore particularly to Fig.1 thereof, this view shows a .pertion of'the stove frame 12-, having the usual top grid members 14: overlyin the burners, one of which will now be descri ed in Each burner is constructed with a base port1on'16 having legs 18 for supporting it upon the horizontal shelf 20 of the stove frame. The base portion 16 is formed with an annular vapor-generating channel 22 for receiving the oil through the inlet passage 24 communicating with an oil-supply connection 26. A removable ring-shaped wick member 28 of asbestos or other suitable material is looselymounted in the channel 22 and projects up above the top margins of said channel. Seated on a ledge 30 extendthe burner is an inner chimney member 32 rovided with the perforations or orifices 34 1n its side walls. .Preferably the chimney 32 is formed in two sections, an upper section 32 and a lower section 32 the former having a reduced extension 36 at its lower end for making a telescoping fit with the upper Patented Aug. 5, 191a.

A ing along the inside of the base portion 16 of end of the section 32"; this two-part structure is with a view to economy in renewing the chimney, since the upper half. of the chimney is subjected ton ue. considerably greater heat than its lower half, and hence requires renewal oftener than the lower half. If desired, however, the chimney 32 may be made in one piece as illustrated in Fig. 9.

The base portion 16 of the burner is also provided with an air bafile element in the form of a plate 38 of slightly smaller diameter than the chimney member 32 so as to provide the annular air passage 40 around the -is a cap member 46 to which is slidingly connected an air tube 48 for suspension cen- 'trally within the chimney 32 with the lower' or air-inlet end of said tube directly overlying the opening 44. Inside said tube is secured a screen element 50, and mounted slidingly on the outside of the tube, for adjustment to different elevations, is an air baflle element in the form of a plate 52 of a diameter very slightly less than that of the chim ney 32.

Removably seated on a ledge 54 extending along the outer margin of the base portion 16 of the burner is an outer chimney mem* ber 56, also formed with perforations or.

orifices 58, the chimneys 32 and 56 being of substantially the same height and providing a combustion space between them outer chimney may be lifted in lightingthe burner. The hood is also provided with a window opening in its lower margin and at the front of the burner so that the action of the flame may be observed at that point.

For the purpose of guiding the hood and the chimney 56 while being raised and lowered, the base portion of the burner carries two or more guide projections 72 which slidingly engage between pairs of lugs 74 carried by the outside wall of the chimney 56, this guiding means also serving to retain these outside parts of the burner in their proper radial relation.

The supply connection. 26 carries at the front of the burner a priming cup 7 6 of a size sufficient to hold'the proper amount of liquid vfuel for initially charging and heating the burner. Within this cup 76 is a spider bearing 78 (see Fig. 7) threaded for the mounting of a needle valve 80 controlling the passage from said cup '76 to the connection 26. The stem of the valve 80 is formed with a finger-engaging extension 82, proje ting outside the cup where stops 84 are locate for limiting the throw of the valve into either open or closed position. Extending into position to drip fuel into the cup 76 is a valve outlet tube 86 leading from the valve 88, preferably of the needle type, this valve being carried in a bracket 89 having a guide stem 90 mounted slidingly in a bracket 92 projecting laterally from the cup 76. A spring 94 coiled about said stem 90 acts to maintain it and the valve 88 normally elevated, so that the valve will bein the fuel through a flexible tube connection 96 (such as a tube of soft metal) leading from the valve to a liquid fuel reservoir, which comprises a basin 98 supported by a bracket 100 from the stove frame, the liquid fuel being supplied from a container 102 placed in inverted position in said basin and having the'usual valve 104 which is pressed open to allow the fuel to escape when in the position illustrated in Fig. 4. Obviously the line of flow through the tube 96 will be at or below the level of the liquid in the basin 98. For retaining the valve 88 at or below said level, a latch member 108 is provided for engagement with the lower end of the stem 90 and holding the latter lowered against the action of its spring 94.

Means is also provided for forming a graduated stop to regulate the degree of opening of the valve 88, for which purpose the knob 110 on the end of the valve stem carries a stop projection 112 adapted to engage with any one of the teeth 114 of a pivoted latch 116, the latter being carried by a plate 118 secured to the valve bracket 89, and actuated by a spring 120. This latch arrangement acts not only 'to limit the throw of the valve to different extents, but also to retain the same in the positions to which it is set.

The outlet tube 86 is fitted-with a sliding so that the gas tubes 130 projecting up therefrom will extend 11p through the openings 44 and preferably within the mouths at the lower ends of the tubes 48. With this arrangement it is apparent that the tubes 48 may be utilized not only for the supply of air the vapor burner structure, but also has a1r and gas mixing tubes in connection with the burning of gaseous fuel. In the latter use a burner cap 132, having the orifices 134,is mounted over the opening 66 of each hood 62 for the proper distribution of the gas burning flame.

It will thus be apparent that a simple and efiicient construction has been devised for carrymg out the desired objects of the invention above enumerated. In the operation of the vapor burner structure, the valve 88 is latched in lowered position as already explained, for bringing the valve within the line of flow of the liquid fuel from the supply reservoir. The valve is then opened wide to allow the fuel to drip into the cup 76, of which the valve 80 has been closed.

When the required measured charge of fuel is thus obtained, the valve 88 is closed and the valve 80' opened to allow the fuel to flow down into the channel 22, where it is lighted after lifting the hood 62 and outer chimney 56, the latter being immediately returned-to their lowered position. As the burner becomes hot from the burning of this initial charge, the fuel is gradually turned on by again opening the valve 88, and'the degree of opening increased as the burner picks up, the amount 'of opening being regulated and set by the operation of the latch 116. With the particular construction and arrangement of the baffle structure shown for controllingthe air supplied to the inside of the chimney 32, it will be observed that the major portion of the air sosupplied is directed-in a path upward at the base of said chimney and around its inner periphery, .forming in effect an annular sheet of 2.11 hugging'th'e inner wall of said chimney,as most of the air entering the opening 44 will be directed up through the central tube 48. The upper baflle element 52 serves to retard the air flow which might otherwise rush to the top of the chimney and at the same time acts to keep the flow of air confined to a path following the inner face of said chimney. It is found that this control of the air entering the inner chimney materially increases the efficiency of the burner action, producing a more nearly perfect combustion and resulting in a clear blue and intensely hot flame. Great simplicity of structure also results from sus pending one or more baffle elements from the central inner tube, and by slidinglymounting the baffle element'thereon the same may be adjusted to its most effective position; The tube itself may also be adjusted within the cap member 46 to set the tube to the proper elevation above the air opening 44:. In this connection it isto be observed that the tube 48 may be made of a length. sufficient to carry the lower b'aflie element as shown at 38 in the modification illustrated in Fig. 9, instead of having said baffle element carried by the base portion of the burner.

The described primingstructure provides a simple and convenient means for measuring and supplying just the right amount of initial charge for lighting the burner without any opportunity arising fordripping or spilling of the liquid fuel. Furthermore,

with the arrangement for tripping the valve out of the line of the flow of the fuel, this t't bination and relative arrangement of the parts in such a way as to provide for the use of the ordinary gas tube in association with the central air tube of the burner, thereby ing the supply of fuel to said burner, and a fuel supply pipe leading from said burner into proximity to said valve. said valve being provided with an outlet tube having its outlet end positioned for feeding into said supply pipe, said outlet tube being movable -with relation to said supply pipe for permitting the outlet end of said tube to be brought either into or out of the line of flow of the'fuel.

2. A stove construction comprising, in combination, a burner, a valve for regulating the fuel supplied to said burner, a liquid fuel supply tank provided with a connection to said valve, said connection permitting relative movement of said valve with relation to said tank, wherebysaid valve may be elevated out of the flow line of the fuel and thereby shut offentirely the flow of fuel through the valve regardless of whether the latter is completely closed.

3. A stove construction comprising, in combination, a-burner, a liquid fuel supply tank, a valve-communicating with said tank and operating to regulate the .flow therefrom to the burner, said tank and valve being mounted for movement of said valve with relation to said tank, whereby said valve may be elevated out of the flow line of the fuel and thereby shut ofi' entirely the flow of fuel through the valve regardless of whether the latter is completely closed, and

means for latching said valve in the line of flow. of the fueL;

45. A stove construction comprising, in

combination, a burner, a valve for regulatmg the supply of fuel to said burner,-a fuel" supply pipe leading from said burner and provided with a priming cup inproximity.

to said valve, said valve being provided. with anjoutlet tube having its outlet end in position to discharge into said priming cup, and a second valve for controlling the passage from said priming cup into said supply pipe,

said outlet tube being movable with relation to said priming cup for permitting the outlet end of said tube to be brought either into or out of the line offlow of the fuel.

5. A stove construction comprising, in combination, a burner, 'a valve for regulating the supply of fuel to said burner, a fuel supply pipe connected with the burner and provided with a priming cup adjacent said valve, said valve being provided with an outlet tube having its outlet end in position v to discharge into said priming cup, a collar mounted slidingly on said outlet tube and shaped to form a closure for said priming cup, and a second valve adapted to control the .passagefrom said priming cup into said supply pipe.

6. A stove construction comprising, in combination, a burner, a liquid fuel supply connection leading to said burner, a valve controlling the flow through said connection, said valve being provided with a stop projection, and a pivoted latch element provided with a plurality of teeth adapted to engage said stop projection in diflerent p0- sitions of said valve and thereby retain said valve in any desired position.

In wltness whereof I afiix my signature.

WILLIAM F. DEWEY. 

